Feeding mechanism for swaging machines



March 8, 927 n 1,61 9,971

\ I: A. DEAN FEEDING MECHANISM FOR SWAGING MACHINES Filed Feb, 9, 1923 2Sheets-Sheet 1 w Malh 89 E. A. DEAN n FEEDING MECHANISM FOR SWAGINGMACHINES Filed Feb. 9, 1923 2 Sheets-Sheet? gwuwnffoz Patented Mar. 8,1927.

UNITED STATES EDSON A. DEAN, 0F EDGEWOOD', RHODE ISLAND.

FEEDING MECHANISM FOR SWAGING MACHINES.

Application filed February 9, 1923.

rI'his invention relates to machines for Serial No. 618,144.

cooperating `inclined member for opening feeding tubular blanks to aswaging mathe jaws to release the finished tube Aand re chine or otherdevice to be operated upon, and the invention has for its object to pro`vide means for engaging a tubular blank and advancing it into positionto be oper ated upon, then to withdraw and deposit the blank, repeatingthe operations successively and automatically.

A further object of the invention is to provide a magazine for supplyingthe blanks and to mount the supporting` vmandrel in line with the blanknext in position to be fed and to advance this blank into position to beoperated upon.

A further object of the invention is the provision of means forfrictionally engaging the blanks to prevent them from being drawn intothe swaging machine while operating upon a. blank to point it.

A still further object of the invention is the provision of a pair ofcams one operat- A.ing upon the mandrel toforce it through the blankwhile the other operates upon the pusher to advance the tube intoposition to b e operated upon by the swaging machine, the cams servingas a positive stop for preventing the tubes from working back whilebeingroperated upon by the swaging ma- Y chine.

`With these andv other objects in view, the invention consists ofcertain novel features of construction, as will be more fully described,and particularly pointed out in the appended claims. j

In the accompanying drawings,

Figure` 1 is a side elevation of my improved machine showing theoperating cams partly broken away and the swaging dies in section. f y

Figure 2 is a top view showing the parts p of the machine in section.

Figure 3 is a sectional end view on line 3 3 of Figure 2.

Figure 4 is a modification illustrating vertical adjustability ofthemagazine.

Figure 5 is a side elevation partly in section illustrating the generalshape of the cam which drives the mandrel sleeve shown in section on themandrel.

Figure 6 is a detail illustrating the general shape ofthe cam whichdrives the pusher on the mandrel.

Figure 7 is a perspective view illustrating the jaws of the frictionalgripper and the ceive the next one to be operated upon.

Figure 8 is a 'sectional top view illustrating the spring b-locks forpreventing a forward movement of the tube whilethe mandrel is beingforced thereinto. r j

Figure 9 is a rear view of the detent blocks showing them slidablymounted j in their frames. j

Figure 1() is a perspective view of one of the tubes. Y

Figure 11 shows one end of a tube as having been swaged to a point. i

It is found in practiceof-` advantage in machines of this character toprovide va magazine for supplying tubes to be operated uponand also tomounta mandrel inline with the lowermost tube whereby an advancingmotion of the mandrel carries thesame through the tube, and to provideapusher for driving the tube into `the swaging device, also to providedirect acting cams foroperating the mechanism which cams accuratelyadvance the work to be operated upon and positively prevent the workfrom sliding back while under action of the swager; also to providefrictional means for preventing the swaging action on the tube fromdrawing j the tube in faster than it should be fed; and the following isa detaileddescription of one form of machine for performing thesefunctions. j

With reference to the drawings, 10 designates the frame of a machinewhich may be constructed in any desired form4 andlwhich may be supportedon suitable legs 11, and in the outer end ofthis frame is mounted a camshaft 13 on which the two operatingicams 14. and 15 are mounted and thisshaft is driven through a large driving pulley 12 which is weighted bymeans of weights (not shown), to counterbalance the oppositelyoverhanging portions of the cams 141 and 15. On this frame 10, I havesupported a magazine 16 in which a multiplicity of tubes 17 are mountedand fed from the feeder' 18 above.

This magazine may be provided with an angular base 19 see Figure 4, inwhich are two sets of adjustable screws 2O and 21, whereby the magazinemay be adjusted vertically to bring the central axis of the lower mosttubes of different diameters on the axial line of the mandrel, presentlydescribed. -At the lower end of this magazine,

Vback to hold its roll in contact with the "edge of the cam by mea-ns ofthe spring 230.

Another slide'l is used as a guide to move parallel with the slide`2etand on the slide 3l 'is mounted a post 32 to which is attached aConnection 33 Vto the tubular pusher 34 Cil mounted on the mandrel 26and the outer end of'this -slide is provided with a friction vroll'Ywhich engages the edge 36 of 'the cam 14, this slide roll being heldback against its cainby means of a st'rongftension spring 3T.

In order to arrest the forward advancing 'of the lowermost tube 38 whenengaged by the mandrel a pair of yieldable blocks 39 are mounted intheframe et() and press inwardly tow-ard ea'ch other by springs il. Theseblocks are provided with a tapering hole l2 throughthem and when thistube 38 is 'first advanced by thevmandrel its inner end engages theledge of this tapering hole and is thus arrested until Vthe mandrelenters and passes through the tube, the pointed end of the mandrel thenserving to press the blocks apart permitting the tube to be advanced bya follower pusher into position to be engaged by the swagingblocks 70.

It has Ibeen found in practice that as these svvagingV `blocks operateupon the tube to point it that the tube often has a tendency to advanceand be drawn into the swaging hammers 'faster than it is pushed by itsadvancing cam. To prevent this laction of the tube while being operatedupon, I have provided a gripper for holding the tube back and preventingsuch advancement, which `gripper comprises essentially a fixed jaw lwhich is mounted to slide on the two guide pms 52 and to which Jaw 1sattached an arm 53 leading down and around 'andback as at 254 so thatits roller 55 will engage the edge 36 ofthey cam 14 and a swingingjaw56' is mounted to slide endwise upon pin 57 and is supported at itsupper end bythe fixed jaw by a keyor hinge plate 58 and this swingingjaw is pressed against the fixed jaw' by means 'of a strong tensionVspring 59. Both oftliese jaws are `groo'ved as at 60 to provideanopening adapted to embrace the opposite sides of the tube to prevent ittfrom being drawn into the swaging machine except 'as fast as it ispushed by its operating cam.

In order to open this swinging jaw 56, I'

have provided the same with a handle 60 which Vextends over m positronto engage :the pointing operation.

the inclined edge 6l of a fixed blade 62 and as the cam la rotates itpermits the arm 54 to recede under tension of spring 63 whereby this pin60 is caused to ride up on the inclined edge of the blade 62 to withdrawthe swinging edge -56 from contact with the fixed jaw 5l and after thecam lil has advanced the tube A38 -up into position to be engaged by thehammer blocks 40 then this arm bei is advanced by the same cam coming incontact with roller 55 to release this jaw to engage the tube, which jawthen frictionally retains the tube while it is being forced therethroughby action ofthe cam upon the pusher 34.

After the tube has 'been pointed the cams are rotated to withdraw themandrel and the pusher and 'subsequently actsv upon this gripperpermitting iti to be withdrawn under tension of spring' to be opened inthe manner above described to release the finished tube to be `droppedinto a receptacle below. This jaw then remains yopen until va fresh tubehas been positioned when the operation is repeated. p

My improved machine is extremely simple and practical in constructionand effective in its operation and by its use tubes are engagedsuccessively, operated upon and discharged from the machine.

The foregoing 'description is directed solely towards the constructionillustrated, but I desire it to be understood that I reserve theprivilege of resorting to all the mechanical changes to which the deviceis susceptible, the invention being `defined and limited only by theterms of the appended claims.

I claim: y

l. An improved feeding mechanism for swaging machines comprising a.feeding mandrel, means for supportingthe work in the path of themandrel, means for advancing the mandrel to engage and move the blankinto position to be operated upon, and means for gripping and retainingthe work during the pointing operation.

2. yAn improved feeding mechanism for swaging machines comprising afeeding mandrel, means for supporting the work in the path of themandrel, means for advancing the mandrel to engage and guide the work,independently operated'me'ans for a'dvancing the work into position tobeoperated upon, and a frictional gripper for controlling the movement oflthe work vduring 3. An improved feeding mechanism, for swaging machines,comprising a feeding mandrel, means for supporting the 'work in the pathof the mandrel, a directactin'g cam for advancing the mandrel linto altube, a tube pusher mounted 'on 'the mandrel, a cam for advancing thetube pusher independently of the movement of said mandrel, and

means for frictionally gripping and ret-aining the tube during thepointing operation.

4. An improved feeding mechanism for swaging machines, comprising amagazine for carrying a plurality of tubes, a feeding mandreloperatively located in line With the tube positioned inthe magazine tobe next operated upon, and means foi advancing the mandrel to engagethis tube and advance the same into position to be operated upon.

5. An improved feeding mechanism for swaging machines, comprising afeeding mandrel, means for supporting the Work in the path of themandrel, means for advancing the mandrel to engage and guide the work,independently operated means for advancing the Work into position to beoperated upon, a frictional gripper for controlling the movement of theWork during the pointing operation, and` means for opening the jaws ofthe gripper for releasing the finished tube and receiving the next to beoperated upon.

6. An improved feeding mechanism for swaging machines, comprisingalmagazine for carrying a plurality of the tubes, a yieldable rest forthe lovvermost tube, a guiding mandrel operatively mounted in line withthe next tube in the magazine to be fed, a pusher slidable on themandrel to advance the tube from its yieldable restl to be operatedupon.

7. An improved feeding mechanism for swaging machines, comprising amagazine for carrying a plurality of the tubes, a rest for the lowermosttube, means for adjusting the magazine vertically, a feeding mandrel,and means for advancing the mandrel and the tubes into position to beoperated upon.

In testimony whereof l aiiiX my signature.

EDSON A. DEAN.

